18535213 has 8 divisors (see below), whose sum is σ = 18994176. Its totient is φ = 18080400.

The previous prime is 18535199. The next prime is 18535243. The reversal of 18535213 is 31253581.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18535213 - 2¹³ = 18527021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18535243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9208 + ... + 11038.

It is an arithmetic number, because the mean of its divisors is an integer number (2374272).

Almost surely, 2^18535213 is an apocalyptic number.

It is an amenable number.

18535213 is a deficient number, since it is larger than the sum of its proper divisors (458963).

18535213 is a wasteful number, since it uses less digits than its factorization.

18535213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2075.

The product of its digits is 3600, while the sum is 28.

The square root of 18535213 is about 4305.2541156127. The cubic root of 18535213 is about 264.6463206285.

Adding to 18535213 its reverse (31253581), we get a palindrome (49788794).

The spelling of 18535213 in words is "eighteen million, five hundred thirty-five thousand, two hundred thirteen".